Is it appropriate to flood threads with thanks?

[kmus]

Every member may have noticed that almost
every thread posted on this forum is followed by
a stream of "thank you" replies. Surprisingly,
even if the subject is a debate and implies
questions or comments, even-though, many
viewers keep replying with "thank you" messages,
to the extent to waste the time of someone who want
to comment --- as this latter needs to check whether his/her
comment have already been posted/answered!

Just browse some reknown forums and notice if such
practice is prevalent?

Thank you for considering this comment, if you want.